Nonlinear optical properties and photoinduced anisotropy of an azobenzene ionic liquid-crystalline polymer |
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| Authors: | Xiaoqiang Zhang Xu Pan Yi Zeng Xuemin Lu |
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| Institution: | a Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, PR China
b School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China |
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| Abstract: | The nonlinear optical properties and photoinduced anisotropy of an azobenzene ionic liquid-crystalline polymer were investigated. The single beam Z-scan measurement showed the polymer film possessed a value of nonlinear refractive index n2 = −1.07 × 10−9 cm2/W under a picosecond 532 nm excitation. Photoinduced anisotropy in the polymer was studied through dichroism and photoinduced birefringence. A photoinduced birefringence value Δn ∼ 10−2 was achieved in the polymer film. The mechanism for the nonlinear optical response and the physical process of photoinduced anisotropy in the polymer were discussed. |
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| Keywords: | 42 65 An 42 65 Jx 42 25 Lc 42 70 Df |
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